Protection device of a surge protector

Abstract

The present invention relates to an protection device of a surge protector, which comprises: a first fuse; a resistor; a switching circuit; a second fuse; and a surge protector; thereby the switching circuit can be turned ON and make the resistor be heated when the sensing end senses a low potential, and then makes the first fuse be opened due to sense heat, so as to cut off the power source.

1. A protective device of a surge protector comprising:
 a) a resistor having a resistor first end and a resistor second end; 
 b) a first fuse having a first fuse first end electrically connected to a first power input end and a first fuse second end electrically connected to the resistor second end and a first power output end; 
 c) a switching circuit is a transistor circuit having a switching circuit first end, a switching circuit second end, and a sensing end, the switching circuit first end is electrically connected to the resistor first end, the switching circuit second end is electrically connected to a second power output end; 
 d) a surge protector having a surge protector first end and a surge protector second end, the surge protector first end is electrically connected to the second power output end; and 
 e) a second fuse having a second fuse first end electrically connected directly to the first power output end, the resistor second end, and the first fuse second end, and a second fuse second end electrically connected to the surge protector second end and sensing end of the switching circuit, 
 
     wherein when the sensing end senses a low potential, the switching circuit is turned on heating the resistor and opening the first fuse thereby cutting off a power source, 
     wherein the surge protector and the second fuse are connected in series between the first power output end and the second power output end. 
   
   
     2. The protective device according to  claim 1 , wherein the first fuse is a temperature fuse. 
   
   
     3. The protective device according to  claim 1 , wherein the second fuse is selected from a group consisting of a temperature fuse and a current fuse. 
   
   
     4. The protective device according to  claim 1 , wherein the first power input end is a line input end, and the second power input end is a neutral input end. 
   
   
     5. The protective device according to  claim 1 , wherein the first power output end is a line output end, and the second power output end is a neutral output end. 
   
   
     6. The protective device according to  claim 1 , wherein the surge protector is a metal oxide varistor. 
   
   
     7. The protective device according to  claim 1 , wherein the resistor sensing a temperature of the first fuse.